Stencil sheet



clear copies can Patented Nov. 30, 1926.

PATENT-'.OFFICE.

snmzrrao norm,

or mono, JAPAN.

STENCIL SHEET,

Application filed. January has a considerable. resistance to atmos-' pheric influences and producessharp and uniform copy through the pressure of the stylus or the impact of the types of a typewriting machine, so that a great number of inal.

In theproduction of stencil sheets it has been proposed to use for coating the porous support, such as yoshino paper, a solution containing monopole soap, or soft soap, in small proportions in a coating composition including gelatine, Irish moss and a considerable proportion of glycerine.

According to the present invention, the composition comprises Funori and alkali soaps of solid fats, such as hardened oils, tallow or Japan wax together with glycerine. The alkali soaps of solid fats are much less soluble than those of liquid fatty oils and produce a gelatinous mass from their aqueous solution This gelatinized soap solution when intimately mixed with Funori and glycerine produces a colloidal compoul'ion which forms a stable and durable coating specially suitable for stencil sheets. If desired, a small amount of agauagar, or gelatine may be added to the above mixture for the purpose of improving the property be obtained from one orig 15, 1926. Serial N0. 81,535.

of the coating. The above mentioned coatmg composition maybe added to the paperpulp in a mixing hollander during the paper making operation.

v Funori is a seaweed (genus Gloiopeltis J. Ag.) indigenous to Japan, which makes a viscous colloidal solution of higher concentration than any other gelatinizing organic colloids, such as agar agar, Irish moss, gelatine, etc. This property gives it the special advantages as an ingredient of the colloidal composition for making the coating operation very easy and resulting in a moderately soft and a very superior coating.

- The proportions of the ingredients of the composition may vary'according to circumstances. The following maybe cited as an example:

Parts in weight. Funoriui O Agar-agar 2 Soda soap of Japan wax 10 Gdycerine. 20 Water 500 What I claim is 1-- 1. A stencil sheet comprising a base of fibrous material impregnated with a colloidal composition including Funori, an alkali soap of solid fats and glycerine.

2. A stencil sheet comprising a base of fibrous material impregnated with a colloidal composition including Funori, agaragar, an alkali soap of solid fats and glycerine.

In testimony whereof I afiix my signature. 1

SHINJIRO HORII.

the stencil paper, 

